Accession Number:

ADA459095

Title:

Thin, Lightweight, Low Frequency Acoustic Projectors for Shallow Water Environments

Descriptive Note:

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC

Report Date:

2000-01-01

Pagination or Media Count:

9.0

Abstract:

Miniature flextensional transducers, called cymbals, have been incorporated into thin, lightweight, large area panels for use as low frequency acoustic projectors in shallow water. The prototype panels, measuring 1OO-mm by lOO-rmn by 6.35-mm thick exhibit a high acoustic output at a relatively low in-water resonance frequency. Furthermore a second resonance frequency that is over an order of magnitude higher suggests that the panel may be used to provide sound output over almost a two decade frequency band. The mass of the unpotted panel is less than 150 grams and the total thickness is 6.35 mm. The cymbal panels are believed to be excellent candidates as acoustic projectors on autonomous andor unmanned underwater vehicle platforms as well as other shallow water platforms where low frequency, light weight and high acoustic output are desired.

Subject Categories:

  • Electrical and Electronic Equipment
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE